N′-(5-Chloro-2-hydroxybenzylidene)nicotinohydrazide

Abstract

There are two independent Schiff base mol­ecules in the asymmetric unit of the title compound, C13H10ClN3O2. The dihedral angles between the benzene and pyridine rings are 12.8 (2) and 1.9 (2)° in the two mol­ecules. Intra­molecular O—H⋯N hydrogen bonds are observed. Mol­ecules are linked into centrosymmetric R 4 4(26) motifs by N—H⋯O and N—H⋯N inter­actions.

Crystal structure of (E)-N′-(5-bromo-2-hydroxybenzylidene)nicotinohydrazide monohydrate

“…A search of the Cambridge Structural Database (Version 5.36, update Feb. 2015;Groom & Allen, 2014) yielded 22 hits for the substructure N 0 -(2-hydroxybenzylidene)nicotinohydrazide. The crystal structure of N 0 -(2-hydroxybenzylidene)nicotinohydrazide itself is reported as a monohydrate (IDASUB; Galić et al, 2001), and the crystal structure of the chloro derivative of the title compound, which crystallized with two independent molecules in the asymmetric unit, has also been reported (MOZPIB; Ren, 2009). In these two research communications A view of the molecular structure of the title compound, showing the atom labelling.…”